Automatic bread slice-toasting oven

ABSTRACT

An automatic bread slice-toasting oven comprises a case, a toasting chamber, a guide rail form toasting shelf, an electrical transmission mechanism and a timing control circuit. A push rod provided with push claws is provided beneath the toasting shelf, the push claws are hinged to the two ends of the push rod via pivot pins respectively, the push rod is connected to the transmission mechanism. The motor rotates in the positive and negative directions by the controlling of the timing control circuit so as to reciprocate the push rod, so that the front claw on the push rod pushes the toasted bread slice out of the toasting chamber and the rear claw pushes a bread slice to be toasted into the toasting chamber. The toasting can be carried out automatically, continuously and alternatively by setting the time period of toasting with safety and convenience, thus increasing the efficiency of toasting greatly and ensuring the quality of the toasted bread slice.

CLAIM OF PRIORITY

[0001] This application claims priority under 35 U.S.C. 119 from People's Republic of China Application No. 01242128.6, filed Jun. 14, 2001, which application is incorporated herein by reference.

BACKGROUND OF THE INVENTION

[0002] 1. Technical Field

[0003] The present invention relates to the technology of electric oven, and more particularly, to an automatic electric oven for toasting slices of bread.

[0004] 2. Description of the Prior Art

[0005] A conventional toasting oven is generally vertical, that is, the oven opens upward, and the operator puts bread slices in the oven or takes them out of the oven manually, thus the efficiency is low and the bread slice tends to be singed because of carelessness during toasting.

SUMMARY OF THE INVENTION

[0006] An object of the present invention is to overcome disadvantages of the conventional toasting oven, and accordingly to provide an oven, which can toast bread slices automatically and continuously. So that complicated manual operations are eliminated, thus ensuring the quality of the toasting bread slices and increasing the toasting efficiency.

[0007] The object of the present invention is accomplished by providing an automatic bread slice-toasting oven comprising a casecase, a pedestal, a toasting chamber, reflecting plates, a toasting shelf and a timing control circuit; the case is disposed on the upper left of the pedestal; the upper part of the toasting chamber is surrounded by the case, the lower part thereof is located in the pedestal; the toasting chamber is formed by clasping an upper reflecting discal plate with a lower reflecting discal plate above the pedestal horizontally, the upper reflecting plate is connected to the upper inner part of the case and opens downward, the lower reflecting plate is connected to the upper inner left part of the pedestal via supports and opens upward; plural electric heating tubes provided between the upper reflecting plate and the lower reflecting plate are disposed parallelly and horizontally to span the toasting chamber; the case is provided with a front door and a rear door, the forepart of the toasting shelf in the guide rail form extends into the toasting chamber through the bottom of the front door and is fixed to the lower reflecting plate, the rearpart thereof is outside the toasting chamber and being supported on the pedestal; the toasting shelf in the guide rail form is provided with a front colliding block, a middle colliding block and a rear colliding block at the front end, the middle part and the rear end thereof respectively; a push rod parallel to the toasting shelf is provided in the pedestal beneath the toasting shelf, the push rod can move in the plane of the toasting shelf in the guide rail form parallelly and is provided with a front push claw and a rear push claw, the front push claw is hinged to the front end of the push rod via a pivot pin, and the rear push claw is also hinged to the rear end of the push rod via a pivot pin, in the pedestal are provided with a sliding block and an electrical transmission mechanism; the rear end of the push rod is connected to the upper part of the sliding block, the electrical transmission mechanism is disposed beneath the sliding block; the input of the motor of the electrical transmission mechanism is connected to the output of the timing control circuit.

[0008] The electrical transmission mechanism comprises a motor, a toothed shaft and a guide shaft; the toothed shaft and the guide shaft parallel to each other are fixed to the pedestal longitudinally and horizontally at both ends thereof via fixing supports and fixing seats respectively. The toothed shaft and the guide shaft pass through the sliding block, the motor is mounted on the sliding block, and a gear is mounted on the output shaft of the motor so as to mesh with the toothed shaft.

[0009] The electrical transmission mechanism comprises a motor, a screw and a sliding block nut, the motor is fixed on the left in the pedestal via a fixing support, the output shaft of the motor is connected to one end of the screw, and the other end of the screw is fixed in a fixing seat on the right in the pedestal, the rear end of the push rod is connected to the upper part of the sliding block nut.

[0010] An entrance height adjusting plate is provided at the door of the case.

[0011] A tray for receiving breadcrumbs is provided between the lower reflecting plate and the toasting shelf in the guide rail form in the lower part of the toasting chamber.

[0012] With the above structure, timing toasting of bread slices can be carried out automatically and continuously by the motor driving the push rod to slide to- and-fro with safety, being convenience and cleanness, thus increasing the toasting efficiency and the quality of the toasted bread slices.

BRIEF DESCRIPTION OF DRAWINGS

[0013] The present invention will be described in detail with reference to the drawings, in which:

[0014]FIG. 1 is a sectional front view showing the structure of an automatic bread slice-toasting oven according to an embodiment of the present invention;

[0015]FIG. 2 is a sectional side view showing the structure of the automatic bread slice-toasting oven in FIG. 1;

[0016]FIG. 3 is a view schematically showing the structure of the transmission mechanism in FIG. 1;

[0017]FIG. 4 is a view schematically showing the structure of the transmission mechanism according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

[0018] Referring to the FIGS, the present invention will be described in detail thereafter.

[0019] As shown in FIGS.1 to 3, there is provided an automatic bread slice-toasting oven comprising a case 30, a pedestal 1, a toasting chamber, reflecting plates 4and 6, toasting shelf 8 in the guide rail form, electric heating tubes 5 and 20, a push rod 22 and an electrical transmission mechanism. The case 30 is disposed on the upper left of the pedestal 1; the upper part of the toasting chamber is enclosed by the case 30, the lower part thereof is disposed in the pedestal 1. The toasting chamber is formed by clasping an upper reflecting discal plate 4 with a lower reflecting discal plate 6 above the pedestal horizontally, the upper reflecting plate 4 is connected to the upper inner part of the case 30 and opens downward, the lower reflecting plate 6 is connected to the upper inner left part of the pedestal 1 via supports 31 and opens upward; plural electric heating tubes 5 and 20 provided between the upper reflecting plate and the lower reflecting plate are disposed parallelly and horizontally to span the toasting chamber; the case 30 is provided with a front door 12 and a rear door 2, the forepart of the toasting shelf in the guide rail form 8 extends into the toasting chamber through the bottom of the front door 12 and is fixed to the lower reflecting plate 6, the aftpart thereof is outside the toasting chamber for placing the bread slices 14 to be toasted thereon; the toasting shelf in the guide rail form 8 are provided with a front colliding block 3, a middle colliding block 9 and a rear colliding block 16 at the front end, the middle part and the rear end thereof respectively; a push rod 22 parallel to the toasting shelf 8 is provided in the pedestal 1 beneath the toasting shelf 8, the push rod 22 is provide with a front push claw 10 and a rear push claw 15, the front push claw 10 is hinged to the front end of the push rod 22 via a pivot pin 13, the rear push claw 15 is also hinged to the rear end of the push rod 22 via a pivot pin, in the pedestal 1 are also provided with a sliding block 23 and an electrical transmission mechanism; the rear end of the push rod 22 is connected to the upper part of the sliding block 23, a toothed shaft 21 and a guide shaft 26 pass through the lower part of the sliding block 23, the toothed shaft 21 and the guide shaft 26 parallel with each other are fixed to the pedestal 1 longitudinally and horizontally at both ends thereof via a fixing support 19 and a fixing seat 29 respectively; a motor 24 is mounted on the sliding block 23, and a gear 25 is mounted on the output shaft of the motor 24 so as to mesh with the toothed shaft 21; an entrance height adjusting plate 11 is provided at the door 12 of the case 30; a tray for receiving breadcrumbs is provided between the lower reflecting plate 6 and the toasting shelf in the guide rail form 8 in the lower part of the toasting chamber.

[0020] The motor is controlled by a timing control circuit (not shown), and can rotate in the positive and the negative directions. When the motor 24 rotates in the positive direction, the gear 25 is meshed with the toothed shaft 21 so as to move the sliding block 23 and the push rod 22 in the plane of the toasting shelf 8 25 parallelly and leftward in FIG. 1, the rear push claw 15 on the push rod 22 pushes a bread slice 14 lying horizontally on the toasting shelf 8 into the toasting chamber so as to toast it, then the front push claw 10 pushes the toasted bread slice 14 out of the toasting chamber and into a meshy basket 17, the front colliding block 3 at the front end of the toasting shelf 8 inside the toasting chamber touches point A at the bottom of the front push claw 10, so that the front push claw 10 is made to turn left around the pivot pin 13 by 90° in FIG. 1, thus lying horizontally in the upper plane of the toasting shelf 8. Here, the timing control circuit controls the motor 24 to rotate in the negative direction, and the push rod 22 returns rightward, since the front push claw 10 lies horizontally, it can not touch the bread slice 7 being toasted, when the push rod 22 arrives the predetermined position, the middle colliding block 9 touches point B at the bottom of the front push claw 10, so that the front push claw 10 is made to turn right around the pivot pin 13 by 90° in FIG. 1, thus erecting. At the same time, the rear push claw 15 is knocked down when it arrives at the front door 12, thus lying horizontally in the upper plane of the toasting shelf 8, therefore, it can not touch the bread slice 14 to be toasted. When the rear push claw 15 returns to the initial position successfully, the rear colliding block 16 touches point C at the bottom of the rear push claw 15, so that it is made to turn right around the pivot pin 13 by 90° in FIG. 1, thus re-erecting. After the bread slice 7 being toasted, that pushing another bread slice to be toasted into the toasting chamber is performed again, thus one operation of pushing a bread slice into and out of the toasting chamber is carried out.

[0021]FIG. 4 is a view showing the structure of the transmission mechanism of another embodiment of the present invention, which can substitute for the transmission mechanism of the above embodiment.

[0022] As shown in FIG. 4, the motor 24 is fixed at the left inner side of the pedestal 1 via the fixing support 19, the output shaft of the motor 24 is coupled to one end of the screw 27, the other end of the screw 27 is fitted into the fixing seat 29 at the right side of the pedestal 1. The screw 27 passes through the sliding block nut 28 and engages therewith, the upper part of the sliding block nut 28 is connected to the rear end of the push rod 22, the input of the motor is connected to the control circuit (not shown), the motor 24 rotates in the positive and negative directions so as to rotate the screw 27, thus moving the sliding block nut 28 from side to side, that is, the push rod 22 reciprocates linearly so as to carry out the operation of pushing the bread slice to be toasted into and out of the toasting chamber.

[0023] The toasting can be carried out automatically, continuously and alternatively by setting the time period of toasting with safety and convenience, thus increasing the efficiency of toasting greatly and ensuring the quality of the toasted bread slice. 

What is claimed is:
 1. An automatic bread slice-toasting oven, comprising a case, a pedestal, a toasting chamber, reflecting plates, a toasting shelf and a timing control circuit; said case is disposed on the upper left of the pedestal; the upper part of the toasting chamber is surrounded by the case, the lower part thereof is located in the pedestal; said toasting chamber is formed by clasping an upper reflecting discal plate with a lower reflecting discal plate above the pedestal horizontally, the upper reflecting plate is connected to the upper inner part of the case and opens downward, the lower reflecting plate is connected to the upper inner left part of the pedestal via supports and opens upward; plural electric heating tubes are provided between the upper reflecting plate and the lower reflecting plate and disposed parallelly and horizontally to span the toasting chamber; said case is provided with a front door and a rear door, the forepart of the toasting shelf in the guide rail form extends into the toasting chamber through the bottom of the front door and is fixed to the lower reflecting plate, the rearpart thereof is outside the toasting chamber and being supported on the pedestal; the toasting shelf in the guide rail form is provided with a front colliding block, a middle colliding block and a rear colliding block at the front end, the middle part and the rear end thereof respectively; a push rod parallel to the toasting shelf is provided in the pedestal beneath the toasting shelf, the push rod can move in the plane of the toasting shelf in the guide rail form parallelly and is provided with a front push claw and a rear push claw, the front push claw is hinged to the front end of the push rod via a pivot pin, and the rear push claw is also hinged to the rear end of the push rod via a pivot pin, in the pedestal are also provided with a sliding block and an electrical transmission mechanism; the rear end of the push rod is connected to the upper part of the sliding block, the electrical transmission mechanism is disposed beneath the sliding block; the input of the motor of the electrical transmission mechanism is connected to the output of the timing control circuit.
 2. The automatic bread slice-toasting oven according to claim 1, wherein said electrical transmission mechanism comprises a motor, a toothed shaft and a guide shaft, the toothed shaft and the guide shaft parallel to each other are fixed to the pedestal longitudinally and horizontally at both ends thereof via fixing supports and fixing seats respectively, the toothed shaft and the guide shaft pass through the sliding block, the motor is mounted on the sliding block, and a gear is mounted on the output shaft of the motor so as to mesh with the toothed shaft.
 3. The automatic bread slice-toasting oven according to claim 1, wherein said electrical transmission mechanism comprises a motor, a screw and a sliding block nut, the motor is fixed on the left in the pedestal via a fixing support, the output shaft of the motor is connected to one end of the screw, and the other end of the screw is fixed in a fixing seat on the right in the pedestal, the rear end of the push rod is connected to the upper part of the sliding block nut.
 4. The automatic bread slice-toasting oven according to claim 1, wherein an entrance height adjusting plate is provided at the door of the case.
 5. The automatic bread slice-toasting oven according to claim 1, wherein a tray for receiving breadcrumbs is provided between the lower reflecting plate and the toasting shelf in the guide rail form in the lower part of the toasting chamber. 